Extruded opening in vessel shell
Extruded opening in vessel shell
(OP)
Is the extruded opening shown in the attached drawing practically feasible, either through hot or cold forming? If so, what would be a sensible size (diameter) for the pre-hole? The material is low-allow carbon steel.





RE: Extruded opening in vessel shell
RE: Extruded opening in vessel shell
What is the motivation for doing it like that?
Depending on the thickness, that detail might require additional reinforcing.
RE: Extruded opening in vessel shell
RE: Extruded opening in vessel shell
Though these usual go outward, in 36" it shouldn't be too hard.
They just pull a well lubricated tool steel ball through the hole.
You can estimate by the wall height that you want to end up with.
You need some extra so that you can machine the end off square, and then do a true butt weld to it.
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P.E. Metallurgy, Plymouth Tube
RE: Extruded opening in vessel shell
RE: Extruded opening in vessel shell
another day in paradise, or is paradise one day closer ?
RE: Extruded opening in vessel shell
I would guess that the starting hole is more like 3"-4".
At this size it wouldn't actually be a ball, probably more of a bullet shape.
They are pulled through, that way to are pushing against the backing support.
You will need some backing support, like a thick ring with 10" ID and the 1.25" corner radius.
The wall will get thinner as you draw it.
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P.E. Metallurgy, Plymouth Tube
RE: Extruded opening in vessel shell